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Dynamics of excited and ionic states of N,N,N′,N′-tetramethyl-p-phenylenediamine in poly(methyl methacrylate) under ablation condition

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Abstract

The nanosecond transient dynamics of N,N,N′,N′-tetramethyl-p-phenylenediamine in poly(methyl methacrylate) has been investigated under ablation condition. Time-resolved spectroscopic data can be interpreted in terms of the dynamics of the lowest excited singlet and triplet states and the cation of TMPD. The decay processes of all the detected transients became rapid with an increase in the laser fluence. It is shown directly that TMPD absorbs about eight 248 nm photons during a nanosecond laser pulse at the ablation threshold of 220 mJ/cm2. These results are well explained by cyclic multiphotonic absorption mechanism where dopant transients work as repetitive absorbers of laser photons.

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Author notes

  1. Hideki Fukumoto

    Present address: Performance Materials R&D Center, Electronics & Information Materials Laboratory, MITSUI CHEMICALS INC., 2-1, Tango-Dori, Minami-Ku, 457-0801, Nagoya, Japan

Authors and Affiliations

  1. Department of Applied Physics, Osaka University, 565-0871, Suita, Japan

    Hisashi Fujiwara, Hideki Fukumoto, Hiroshi Fukumura & Hiroshi Masuhara

  2. Faculty of Information Sciences, Hiroshima City University, 3-4-1 Ozuka Higashi, Asa-minami-ku, 731-3194, Hiroshima, Japan

    Hisashi Fujiwara

Authors
  1. Hisashi Fujiwara
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  2. Hideki Fukumoto
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  3. Hiroshi Fukumura
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  4. Hiroshi Masuhara
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Fujiwara, H., Fukumoto, H., Fukumura, H. et al. Dynamics of excited and ionic states of N,N,N′,N′-tetramethyl-p-phenylenediamine in poly(methyl methacrylate) under ablation condition. Res. Chem. Intermed. 24, 879–892 (1998). https://doi.org/10.1163/156856798X00357

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  • DOI: https://doi.org/10.1163/156856798X00357

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